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1; RUN: opt -S < %s -passes=loop-unroll -unroll-count=4 | FileCheck %s2;3; Test induction variable simplify after loop unrolling. It should4; expose nice opportunities for GVN.5;6; CHECK-NOT: while.body also ensures that loop unrolling (with SCEV)7; removes unrolled loop exits given that 128 is a multiple of 4.8 9target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f80:128:128-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"10 11; PR10534: LoopUnroll not keeping canonical induction variable...12; CHECK: while.body:13; CHECK-NOT: while.body.1:14; CHECK: %shr.1 = lshr i32 %bit_addr.addr.01, 515; CHECK: %arrayidx.1 = getelementptr inbounds i32, ptr %bitmap, i32 %shr.116; CHECK: %shr.2 = lshr i32 %bit_addr.addr.01, 517; CHECK: %arrayidx.2 = getelementptr inbounds i32, ptr %bitmap, i32 %shr.218; CHECK: %shr.3 = lshr i32 %bit_addr.addr.01, 519; CHECK: %arrayidx.3 = getelementptr inbounds i32, ptr %bitmap, i32 %shr.320define void @FlipBit(ptr nocapture %bitmap, i32 %bit_addr, i32 %nbits) nounwind {21entry:22 br label %while.body23 24while.body:25 %nbits.addr.02 = phi i32 [ 128, %entry ], [ %dec, %while.body ]26 %bit_addr.addr.01 = phi i32 [ 0, %entry ], [ %inc, %while.body ]27 %dec = add i32 %nbits.addr.02, -128 %shr = lshr i32 %bit_addr.addr.01, 529 %rem = and i32 %bit_addr.addr.01, 3130 %shl = shl i32 1, %rem31 %arrayidx = getelementptr inbounds i32, ptr %bitmap, i32 %shr32 %tmp6 = load i32, ptr %arrayidx, align 433 %xor = xor i32 %tmp6, %shl34 store i32 %xor, ptr %arrayidx, align 435 %inc = add i32 %bit_addr.addr.01, 136 %tobool = icmp eq i32 %dec, 037 br i1 %tobool, label %while.end, label %while.body38 39while.end:40 ret void41}42